The Lancer Magazine Coupler was developed for the L5" L5A and L5AWM Translucent Magazines. Ensures that the magazines are aligned and held securely without obscuring the view of the rounds. Also compatible with USGI Aluminum and Steel Magazines.Features :Fits L5, L5A and L5AWM Translucent MagazinesFits USGI Aluminum and Steel MagazinesDoes not Obscure View of the Rounds in Lancer Magazines